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STOCKHOLDERS’ EQUITY - Summary of Unvested Options and Changes (Detail) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
May 30, 2019
Dec. 31, 2020
Stock Options    
Options    
Granted (in shares) 5,542,668  
Parent Company    
Options    
Granted (in shares)   2,292,000
Weighted Average Grant Date Fair Value    
Total fair value of options vested   $ 6.1
Parent Company | Stock Options    
Options    
Unvested at beginning of period (in shares)   4,517,000
Granted (in shares)   2,292,000
Vested (in shares)   (1,157,000)
Forfeited (in shares)   (161,000)
Unvested at end of period (in shares)   5,491,000
Weighted Average Grant Date Fair Value    
Unvested at beginning of period (in dollars per share)   $ 5.28
Granted (in dollars per share)   4.76
Vested (in dollars per share)   5.29
Forfeited (in dollars per share)   5.20
Unvested at end of period (in dollars per share)   $ 5.06